SAFETY AUTOMATIC VALVE Russian patent published in 2021 - IPC F24F13/14 

FIELD: ventilation systems.

SUBSTANCE: invention relates to ventilation systems for buildings and structures equipped with protective equipment against damaging effects. The protective automatic valve contains a support body, body sections, each of which has a through groove for the passage of air, as well as interacting with the body, interconnected movable elements connected to the drive of their movement and overlapping the through grooves of the body. Each movable element is made in the form of a bar pivotally connected to the body, having a cam with an inclined surface fixed on it. The drive is made in the form of a toothed rack, the tooth of each rack has an inclined surface and is arranged to interact with the inclined surface of the strip cam. The rack is connected to the electromagnetic and manual drives of its movement by means of the electromagnetic drive rod. The stem is located in the slider of the handwheel for manual movement of the rack. An axis is located in the lugs on the lower surface of each section of the support body, on which the bar is hingedly fixed with the possibility of its rotation in the vertical plane relative to the support body.

EFFECT: increase in the reliability of the automatic safety valve.

3 cl, 3 dwg